Enjoyable, sufficiently taxing, though I was slow on the uptake with a few: LOI 11a was clever, COD 23a was fun.
Can a newish member of this forum ask the old hands about 10a? Is there a conventional way round to put the solution? Or is there a signifier in the clue that I missed? Or must one wait to get one of the crossers?
Puzzling over this (not for the first time) reminded me of first trying to learn arithmetic at school (and not doing very well). This was because I took the teacher literally when she said the sign of the number was 'in front' and understood this to mean following it on the line! I always wondered whether this was because I was left handed!